229891 has 4 divisors (see below), whose sum is σ = 243432. Its totient is φ = 216352.

The previous prime is 229849. The next prime is 229897. The reversal of 229891 is 198922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229891 - 2⁷ = 229763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6745 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (60858).

2²²⁹⁸⁹¹ is an apocalyptic number.

229891 is a deficient number, since it is larger than the sum of its proper divisors (13541).

229891 is a wasteful number, since it uses less digits than its factorization.

229891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540.

The product of its digits is 2592, while the sum is 31.

The square root of 229891 is about 479.4694985085. The cubic root of 229891 is about 61.2595764563.

Adding to 229891 its sum of digits (31), we get a palindrome (229922).

The spelling of 229891 in words is "two hundred twenty-nine thousand, eight hundred ninety-one".